Thyroid Test (Small)
Complete thyroid function test home kit. Measures TSH, fT3 & fT4 to identify subclinical hypothyroidism markers. Easy finger-prick lab test with digital results.
Product details: USD 109 — InStock — SKU gettested_thyroid_test_small_test — GetTested
About this test
What This Test Measures
GetTested’s Thyroid Test (Small) measures TSH, free T3 (fT3), and free T4 (fT4).
TSH is produced by the pituitary gland and signals the thyroid to produce hormones. T4 is the primary hormone released by the thyroid, while T3 is the active form that the body uses at the cellular level.
By measuring these markers together, the test provides insight into thyroid signaling, hormone production, and conversion. This offers a more complete understanding of thyroid function than assessing a single marker alone.
How It Works
You collect a small blood sample at home using a finger-prick method. The sample is then sent to a certified laboratory for analysis, and your results are delivered digitally once testing is complete.
Dried Blood Spot (DBS) Collection
The test uses a dried blood spot (DBS) sample. A few drops of blood are collected from your fingertip and placed on a collection card, which is then left to dry before being sent to the laboratory.
This method is widely used and offers a convenient alternative to traditional blood sampling.
Who Should Consider This Test
This test is relevant for individuals who want insight into thyroid function and how it may relate to energy levels, metabolism, and overall well-being.
It may be particularly useful in cases of symptoms such as fatigue, weight changes, sensitivity to cold or heat, or when evaluating thyroid-related concerns such as hypothyroidism or hyperthyroidism. It can also be used as a general assessment of thyroid function.
Understanding CLIA Certification
Your sample is analyzed in a CLIA-certified laboratory, ensuring that testing is performed according to established U.S. quality standards using validated methods.
Biomarkers included
- TSH: Thyroid-Stimulating Hormone (TSH), also known as thyrotropin, is a hormone produced by the pituitary gland. It plays a crucial role in regulating thyroid function by stimulating the thyroid gland to produce and release thyroid hormones (T3 and T4), which are vital for metabolism, growth, and development. Measuring TSH levels is a primary way to assess thyroid gland activity and diagnose thyroid di
- Free Triiodothyronine (fT3): Free Triiodothyronine (fT3) is the unbound, active form of the thyroid hormone triiodothyronine (T3). It is crucial for regulating metabolism, energy levels, body temperature, and heart function. Measuring fT3 provides a direct assessment of the biologically active thyroid hormone available to tissues, reflecting current thyroid function more accurately than total T3 in many cases.
- Free Thyroxine (fT4): Free Thyroxine (fT4) is the unbound, active form of the thyroid hormone thyroxine in the bloodstream. It's crucial for assessing thyroid function because it directly reflects the amount of hormone available to regulate metabolism, growth, and energy levels. Measuring fT4 helps diagnose and monitor conditions like hyperthyroidism (too much) or hypothyroidism (too little) thyroid hormone.
How to prepare
Collect sample in the morning before eating. Avoid Biotin supplements for 72 hours prior to testing.
Frequently asked questions
Why should I test T3 and T4 if my doctor only tests TSH?
Standard TSH tests may miss 'Subclinical Hypothyroidism' or 'Low T3 Syndrome.' By measuring Free T3 and Free T4, you can see if your body is successfully converting and utilizing thyroid hormones, providing a much clearer picture than TSH alone.
How accurate is a finger-prick test compared to a clinical draw?
Extensive clinical studies show a high correlation between DBS samples and venous blood for TSH, fT4, and fT3. The drying process preserves the hormones for stable transport, making the thyroid function test home kit a reliable alternative to clinical draws.
Do I need to fast or stop supplements before the test?
Ideally, you should collect your sample in the morning while fasting. Note that Biotin (Vitamin B7) supplements can interfere with results; it is recommended to stop taking Biotin 48-72 hours before collection to ensure accurate subclinical hypothyroidism markers are detected.
Is this test suitable for monitoring existing medication?
If you are taking thyroid medication (like Levothyroxine), it is generally recommended to take your sample before your daily dose. This allows you to check t3 t4 levels at home at their baseline. Always consult your healthcare provider for specific guidance regarding medication.
Customer reviews
4.6/5 (5)
- 4/5 — The finger prick was easy to do. Got my results back in 8 days.
- 5/5 — Fast delivery and the results were easy to read.
- 5/5 — Great way to track my levels.
- 4/5 — Very convenient for checking T3/T4 without a doctor's visit. A bit of a wait for the lab but worth it.
- 5/5 — Clear instructions and fast results.